Advertisements
Advertisements
प्रश्न
What will happen if a saturated solution is :
- heated
- cooled
Advertisements
उत्तर
If a saturated solution is heated to a higher temperature, then it becomes unsaturated. If a saturated solution is cooled to a lower temperature, then some of its dissolved solute will separate out in the form of solid crystals.
APPEARS IN
संबंधित प्रश्न
Name the terms for the change of a solid into liquid.
Define the following term of Atom .
Fill in the following blank with suitable words :
The best evidence that the particles of matter are constantly moving comes from the studies of ................. and ...................
The best evidence for the existence and movement of particles in liquids was provided by :
Name a metal which is soft and a non-metal which is hard.
State any two properties for believing that aluminium is a metal.
Name a metal which is yellow in colour.
Iron powder and sulphur powder were mixed together and divided into two parts A and B. When part A was heated strongly over a burner, then a substance C was formed. The part B was, however, not heated at all. When dilute hydrochloric acid was added to substance C, then gas D was evolved and when dilute hydrochloric acid was added to part B then gas E was evolved.
- What type of substance is B ?
- What type of substance is C ?
- Name the gas (i) D, and (ii) E ?
- State one characteristic property of gas D.
- Write one test to identify gas E.
A, B and C are all liquids. Liquid A has a comparatively low boiling point. On heating, liquid A vaporises completely without leaving behind any residue. Liquid A is being used increasingly as a fuel in motor vehicles either alone or by mixing with petrol. Liquid B has a very high boiling point. It also vaporises completely on heating, without leaving any residue. Liquid B is a conductor of electricity and used in making thermometers. Liquid C has a moderate boiling point. On heating, liquid C vaporises leaving behind a white solid D which is used in cooking vegetables. The condensation of vapours from C give a liquid E which turns anhydrous CuSO4 to blue.
(a) Which liquid could be an element ? Name this element.
(b) Which liquid could be a mixture ? Name this mixture.
(c) Which liquid could be a compound ? Name this compound.
(d) What could the solid D be ?
(e) What do you think is liquid E ?
Out of a colloid, solution and a suspension :
which one has the smallest particles ?
What is the most common way of expressing the concentration of a solution ?
What happens when the temperature of a saturated sugar solution is increased ?
A carpenter wants to separate iron nails from saw-dust. Which method of separation should he choose ?
How is cream separated from milk ?
The correct increasing order of the boiling points of liquid oxygen, liquid argon and liquid nitrogen present in liquid air is :
A solid mixture contains four constituents P, Q, R and S. P consists of tiny grains and it is mixed with
cement for plastering the walls. Q is a white solid which is recovered on a large scale from sea water by the
process of evaporation. R is in the form of tiny particles of a material whose corrosion is called rusting. And
S is a white solid which is used in making ordinary dry cells.
- What could P, Q, R and S be ?
- How would you separate a mixture containing P, Q, R and S ?
Name one pair of liquids which can be separated by using a separating funnel.
Complete the given analogy.
Murukku from hot oil: ______:: Coffee powder residue from decoction: ______
Stars including Sun are covered in ______.
Define the term matter.
